320 SWIKE PRACTICE 



successful, but in the advanced stages the disease usually proves fatal 

 regardless of treatment. The most successful treatment consists in 

 washing the oral cavity and applying upon the eroded areas one- 

 percent solutions of silver nitrate or three-to five-percent solutions of 

 zinc ehlorid. Local treatment should be repeated frequently. 



NECROTIC ENTERITIS 



Bacillus necrophorus infection may occur in the intestinal mucosa 

 and produce lesions similar to those in necrotic stomatitis. 



NECROTIC RHINITIS 



This condition is usually associated with necrosis of the snout and 

 frequently also of th? lips, and is of rather common occurrence in 

 small pigs. It is one of the conditions that constitutes the disease called 

 sniflfles. Sniffles also includes infectious rhinitis, particularly those 

 cases in which deformity of the snout and nasal cavities occurs, and 

 those cases of rickets in which there is involvement of the nasal and 

 facial bones, causing more or less deformity. 



Lesions. — Necrobacillosis of the schneiderian mucous membrane and 

 the snout is characterized by the same lesions that are characteristic 

 of necrotic stomatitis, except that here bone tissue is frequently in- 

 volved, resulting in fibrous proliferation and deformity of the parts. 



Symptoms. — The affected animals have a tendency to root consid- 

 erably in their food, but they eat little. The characteristic symptom 

 consists of a peculiar blowing noise. The animals sneeze, and occa- 

 sionally expel bloody material containing shreds of tissue. The snout 

 becomes enlarged and the face bulging, this condition frequently 

 being called elephant head. 



Treatment. — It is not possible to treat these cases efficiently because 

 of the difficulty of applying medicaments to the lesion and further 

 because of the destructive changes in the bones of the nose and face. 



NECROTIC PNEUMONIA 



Necrotic pneumonia is frequently an associated condition of necrotic 

 rhinitis, the infection taking place by the inhalation of necrotic par- 

 ticles from the nose. 



Lesions. — The same general coagulation necrosis type of lesions that 

 characterizes necrobacillosis is observed also in necrotic pneumonia. 



Symptoms. — Manifestations of the disease are similar to those of 



